Pipe skelp



Jan. 9, 1929. 1,698,584

C. FELL V PIPE- SKELP Filed April 21, 1926 la'fiyzesses 1730976507! W M 0/454 5 FELL Patented Jan. 8, 1929.

UNITED STATES PATENT, orr ca.

GHARLEQ FELL, OF ELYRIA, OHIO, ASSIGNOR TO NATIONAL TUBE COMPANY, A CORPORATION OF NEW JERSEY.

PIPE SKELP.

Application filed April- 21, 1926. Serial No. 103,516.

This invention relates to pi e skelp and more particularly to butt-wel pipe slzelp, and has for one of its objects the provis on of skelp having novel welding edges whlch will provide a greater weldin area.

Another object is to provi e a pipe skelp having novel welding edges which may be made more uniform than the form of edges heretofore employed.

A further 0 ject is to provide a pipe skelp having novel welding edges which are adapted to form stronger and smoother welds than the dotted line designating the line of weld.

Referring'more particularly to the drawings, the numeral 2 designates the skelp piece as a whole for use in forming true butt-weld pipe, which skelp is formed b reducing a heated billet by any suitable ro ling method.

The one longitudinal edge of the skelp piece 2 is transversely dished or hollowed for its entire length to form a truly concave-recess 3 extendin along the entire longitudinal edge of the piece. The other longitudinal edge of the skelp piece 2 is rounded transversely so as to form a truly convex longitudinal edge 4 extending along the entire longitudinal edge of the piece. The term concave, here and in the appended claims, is intended to describe an edge which is hollow and rounded, as is the interior of a sphere or circle, and is'opposed to convex, which term, here and in the appended claims, is intended to describe an edge which is curving like the segment of a globe or of thesurface of a circle, so as to form a rounded elevation. Thus it will be seen that the convexed edge is rounded from one side of the skelp piece 2 to the other side thereof, and the concaved edge is hollowed or dished from one side to the other side of said'skel piece.

The convex edge 4 has t 4 e same or substantially the same radius-as the concave edge 3, and is adapted tosnugly fit within the concave recessed edge 3 when the edges of the skelp are brought together in passing through a standard welding bell without an internal support. Thus a butt-welded surface is formed having a materially greater area than the longitudinal cross-sectional area of the skelp, without materially increasing the Wall thickness of the pipe formed therefrom. The finished pipe shown i'n'Figure 3 and designated by the numeral 5, shows by the dotted line 6 the contact or weld line of the edges 3 and 4 when buttedand welded.

By-forming the skelp as above described, a more uniform edge can be maintained and, therefore, a better weld can be made. Also, due to the novel shape of the edges 3 and 4, the contact or welding area of the edges is increased approximately twenty per cent over the straight edges used prior to this invention. V

Due to the uniformity of the edges and the increased. contact area of the edges amaterlally stronger and smoother weld or joint is obtained.

While I have shown and described one speclfic form of my invention, it will be understood that I do not wish to be limited thereto, since various modifications may be made without departing from the scope of my lnventlon as defined in the appended claims.

I claim:

1. As an article of manufacture a skelp plece for use in forming a true butt-weld pipe by drawing the heated skelp through a forming bell without an internal support, said, skelp iece having one of its longitudinal edges ormed truly concave from side to side and its other lon 'tudinal edge formed truly convex from si e to side so as to snu ly abut each other when welded, said edges %emg adapted to form a butt-welded surface of materially greaterarea than the longitudinal cross-sectional area of the skelp, without materially increasing the wall thickness of the pipe formed therefrom.

2. As an article of manufacture, a skelp piece for use in forming a true butt-weld W) pipe, said skelp iece having one of its lonlon itudinal cross-sectional area of the skelp,- 'gitudinal edges ormed truly concave from without materially increasing the wall thickside to side and its other longitudinal edge ness of the pipe formed therefrom. 1 formed truly convex from side to side so,as In testimony whereof, I have hereunto B to snugly abut each other when welded, said signed my name. i

edges being adapted to forma buttwelded surface of materially greater area than the CHARLES FELL. 

